{
struct pnfs_layout_segment *s;
- if (!test_bit(NFS_LSEG_LAYOUTRETURN, &lseg->pls_flags))
+ if (!test_and_clear_bit(NFS_LSEG_LAYOUTRETURN, &lseg->pls_flags))
return false;
list_for_each_entry(s, &lo->plh_segs, pls_list)
return true;
}
+static bool
+pnfs_prepare_layoutreturn(struct pnfs_layout_hdr *lo)
+{
+ if (test_and_set_bit(NFS_LAYOUT_RETURN, &lo->plh_flags))
+ return false;
+ lo->plh_return_iomode = 0;
+ pnfs_get_layout_hdr(lo);
+ clear_bit(NFS_LAYOUT_RETURN_BEFORE_CLOSE, &lo->plh_flags);
+ return true;
+}
+
static void pnfs_layoutreturn_before_put_lseg(struct pnfs_layout_segment *lseg,
struct pnfs_layout_hdr *lo, struct inode *inode)
{
if (pnfs_layout_need_return(lo, lseg)) {
nfs4_stateid stateid;
enum pnfs_iomode iomode;
+ bool send;
stateid = lo->plh_stateid;
iomode = lo->plh_return_iomode;
- /* decreased in pnfs_send_layoutreturn() */
- lo->plh_block_lgets++;
- lo->plh_return_iomode = 0;
+ send = pnfs_prepare_layoutreturn(lo);
spin_unlock(&inode->i_lock);
- pnfs_get_layout_hdr(lo);
-
- /* Send an async layoutreturn so we dont deadlock */
- pnfs_send_layoutreturn(lo, stateid, iomode, false);
+ if (send) {
+ /* Send an async layoutreturn so we dont deadlock */
+ pnfs_send_layoutreturn(lo, stateid, iomode, false);
+ }
} else
spin_unlock(&inode->i_lock);
}
pnfs_layoutreturn_before_put_lseg(lseg, lo, inode);
if (atomic_dec_and_lock(&lseg->pls_refcount, &inode->i_lock)) {
+ if (test_bit(NFS_LSEG_VALID, &lseg->pls_flags)) {
+ spin_unlock(&inode->i_lock);
+ return;
+ }
pnfs_get_layout_hdr(lo);
pnfs_layout_remove_lseg(lo, lseg);
spin_unlock(&inode->i_lock);
test_bit(NFS_LSEG_VALID, &lseg->pls_flags));
if (atomic_dec_and_test(&lseg->pls_refcount)) {
struct pnfs_layout_hdr *lo = lseg->pls_layout;
+ if (test_bit(NFS_LSEG_VALID, &lseg->pls_flags))
+ return;
pnfs_get_layout_hdr(lo);
pnfs_layout_remove_lseg(lo, lseg);
pnfs_free_lseg_async(lseg);
return !pnfs_seqid_is_newer(seqid, lo->plh_barrier);
}
-static bool
-pnfs_layout_returning(const struct pnfs_layout_hdr *lo,
- struct pnfs_layout_range *range)
-{
- return test_bit(NFS_LAYOUT_RETURN, &lo->plh_flags) &&
- (lo->plh_return_iomode == IOMODE_ANY ||
- lo->plh_return_iomode == range->iomode);
-}
-
/* lget is set to 1 if called from inside send_layoutget call chain */
static bool
-pnfs_layoutgets_blocked(const struct pnfs_layout_hdr *lo,
- struct pnfs_layout_range *range, int lget)
+pnfs_layoutgets_blocked(const struct pnfs_layout_hdr *lo)
{
return lo->plh_block_lgets ||
- test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags) ||
- (list_empty(&lo->plh_segs) &&
- (atomic_read(&lo->plh_outstanding) > lget)) ||
- pnfs_layout_returning(lo, range);
+ test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags);
}
int
dprintk("--> %s\n", __func__);
spin_lock(&lo->plh_inode->i_lock);
- if (pnfs_layoutgets_blocked(lo, range, 1)) {
+ if (pnfs_layoutgets_blocked(lo)) {
status = -EAGAIN;
} else if (!nfs4_valid_open_stateid(open_state)) {
status = -EBADF;
clear_bit_unlock(NFS_LAYOUT_RETURN, &lo->plh_flags);
smp_mb__after_atomic();
wake_up_bit(&lo->plh_flags, NFS_LAYOUT_RETURN);
+ rpc_wake_up(&NFS_SERVER(lo->plh_inode)->roc_rpcwaitq);
}
static int
if (unlikely(lrp == NULL)) {
status = -ENOMEM;
spin_lock(&ino->i_lock);
- lo->plh_block_lgets--;
pnfs_clear_layoutreturn_waitbit(lo);
- rpc_wake_up(&NFS_SERVER(ino)->roc_rpcwaitq);
spin_unlock(&ino->i_lock);
pnfs_put_layout_hdr(lo);
goto out;
LIST_HEAD(tmp_list);
nfs4_stateid stateid;
int status = 0, empty;
+ bool send;
dprintk("NFS: %s for inode %lu\n", __func__, ino->i_ino);
/* Don't send a LAYOUTRETURN if list was initially empty */
if (empty) {
spin_unlock(&ino->i_lock);
- pnfs_put_layout_hdr(lo);
dprintk("NFS: %s no layout segments to return\n", __func__);
- goto out;
+ goto out_put_layout_hdr;
}
set_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags);
- lo->plh_block_lgets++;
+ send = pnfs_prepare_layoutreturn(lo);
spin_unlock(&ino->i_lock);
pnfs_free_lseg_list(&tmp_list);
-
- status = pnfs_send_layoutreturn(lo, stateid, IOMODE_ANY, true);
+ if (send)
+ status = pnfs_send_layoutreturn(lo, stateid, IOMODE_ANY, true);
+out_put_layout_hdr:
+ pnfs_put_layout_hdr(lo);
out:
dprintk("<-- %s status: %d\n", __func__, status);
return status;
}
if (!found)
goto out_noroc;
- lo->plh_block_lgets++;
+ if (test_and_set_bit(NFS_LAYOUT_RETURN, &lo->plh_flags))
+ goto out_noroc;
+ lo->plh_return_iomode = IOMODE_ANY;
pnfs_get_layout_hdr(lo); /* matched in pnfs_roc_release */
spin_unlock(&ino->i_lock);
pnfs_free_lseg_list(&tmp_list);
out_noroc:
if (lo) {
stateid = lo->plh_stateid;
- layoutreturn =
- test_and_clear_bit(NFS_LAYOUT_RETURN_BEFORE_CLOSE,
- &lo->plh_flags);
- if (layoutreturn) {
- lo->plh_block_lgets++;
- pnfs_get_layout_hdr(lo);
- }
+ if (test_and_clear_bit(NFS_LAYOUT_RETURN_BEFORE_CLOSE,
+ &lo->plh_flags))
+ layoutreturn = pnfs_prepare_layoutreturn(lo);
}
spin_unlock(&ino->i_lock);
if (layoutreturn) {
spin_lock(&ino->i_lock);
lo = NFS_I(ino)->layout;
- lo->plh_block_lgets--;
+ pnfs_clear_layoutreturn_waitbit(lo);
if (atomic_dec_and_test(&lo->plh_refcount)) {
pnfs_detach_layout_hdr(lo);
spin_unlock(&ino->i_lock);
spin_unlock(&ino->i_lock);
}
-bool pnfs_roc_drain(struct inode *ino, u32 *barrier, struct rpc_task *task)
+void pnfs_roc_get_barrier(struct inode *ino, u32 *barrier)
{
struct nfs_inode *nfsi = NFS_I(ino);
struct pnfs_layout_hdr *lo;
- struct pnfs_layout_segment *lseg;
nfs4_stateid stateid;
u32 current_seqid;
- bool found = false, layoutreturn = false;
spin_lock(&ino->i_lock);
- list_for_each_entry(lseg, &nfsi->layout->plh_segs, pls_list)
- if (test_bit(NFS_LSEG_ROC, &lseg->pls_flags)) {
- rpc_sleep_on(&NFS_SERVER(ino)->roc_rpcwaitq, task, NULL);
- found = true;
- goto out;
- }
lo = nfsi->layout;
current_seqid = be32_to_cpu(lo->plh_stateid.seqid);
* a barrier, we choose the worst-case barrier.
*/
*barrier = current_seqid + atomic_read(&lo->plh_outstanding);
-out:
- if (!found) {
- stateid = lo->plh_stateid;
- layoutreturn =
- test_and_clear_bit(NFS_LAYOUT_RETURN_BEFORE_CLOSE,
- &lo->plh_flags);
- if (layoutreturn) {
- lo->plh_block_lgets++;
- pnfs_get_layout_hdr(lo);
- }
- }
+ stateid = lo->plh_stateid;
spin_unlock(&ino->i_lock);
- if (layoutreturn) {
- rpc_sleep_on(&NFS_SERVER(ino)->roc_rpcwaitq, task, NULL);
- pnfs_send_layoutreturn(lo, stateid, IOMODE_ANY, false);
- }
- return found;
}
/*
static bool pnfs_prepare_to_retry_layoutget(struct pnfs_layout_hdr *lo)
{
+ if (!pnfs_should_retry_layoutget(lo))
+ return false;
/*
* send layoutcommit as it can hold up layoutreturn due to lseg
* reference
* Because we free lsegs before sending LAYOUTRETURN, we need to wait
* for LAYOUTRETURN even if first is true.
*/
- if (!lseg && pnfs_should_retry_layoutget(lo) &&
- test_bit(NFS_LAYOUT_RETURN, &lo->plh_flags)) {
+ if (test_bit(NFS_LAYOUT_RETURN, &lo->plh_flags)) {
spin_unlock(&ino->i_lock);
dprintk("%s wait for layoutreturn\n", __func__);
if (pnfs_prepare_to_retry_layoutget(lo)) {
goto out_put_layout_hdr;
}
- if (pnfs_layoutgets_blocked(lo, &arg, 0))
+ if (pnfs_layoutgets_blocked(lo))
goto out_unlock;
atomic_inc(&lo->plh_outstanding);
spin_unlock(&ino->i_lock);
lseg->pls_range = res->range;
spin_lock(&ino->i_lock);
- if (test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags)) {
- dprintk("%s forget reply due to recall\n", __func__);
- goto out_forget_reply;
- }
-
- if (pnfs_layoutgets_blocked(lo, &lgp->args.range, 1)) {
+ if (pnfs_layoutgets_blocked(lo)) {
dprintk("%s forget reply due to state\n", __func__);
goto out_forget_reply;
}
spin_lock(&inode->i_lock);
/* set failure bit so that pnfs path will be retried later */
pnfs_layout_set_fail_bit(lo, iomode);
- set_bit(NFS_LAYOUT_RETURN, &lo->plh_flags);
if (lo->plh_return_iomode == 0)
lo->plh_return_iomode = range.iomode;
else if (lo->plh_return_iomode != range.iomode)
if (ld->prepare_layoutcommit) {
status = ld->prepare_layoutcommit(&data->args);
if (status) {
+ put_rpccred(data->cred);
spin_lock(&inode->i_lock);
set_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags);
if (end_pos > nfsi->layout->plh_lwb)
nfsi->layout->plh_lwb = end_pos;
- spin_unlock(&inode->i_lock);
- put_rpccred(data->cred);
- goto clear_layoutcommitting;
+ goto out_unlock;
}
}
#if IS_ENABLED(CONFIG_NFS_V4_2)
int
-pnfs_report_layoutstat(struct inode *inode)
+pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags)
{
struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld;
struct nfs_server *server = NFS_SERVER(inode);
pnfs_get_layout_hdr(hdr);
spin_unlock(&inode->i_lock);
- data = kzalloc(sizeof(*data), GFP_KERNEL);
+ data = kzalloc(sizeof(*data), gfp_flags);
if (!data) {
status = -ENOMEM;
goto out_put;
projects / linux-2.6-block.git / blobdiff